Google Street View is fun and also hugely useful.
Today’s invention is a way for occupants to express their personalities via this medium, if they choose to.
A property owner or tenant could mail a special division of Google with proof of their occupany. They would then receive a software key in the post allowing them to upload a limited number of facial images to append to their home’s image in Street View.
The faces could be automatically checked before being made public (to ensure that they weren’t all Obama or pac-men, etc).
These faces would then would lie on an optional overlay viewable by anyone interested in eg Who lives at number 58?
A slightly more advanced version would allow individuals’ Twitter feeds to be viewed by clicking on their facial images.